OPERATOR’S MANUAL with Maintenance Information
Maintenance
49
Checklist C Procedures
C-1
Test the Platform Overload System
Dingli specifications require that this procedure
be performed every 500 hours or
semi-annually, whichever comes first OR when
the machine fails to lift the maximum rated
load.
Testing the platform overload system regularly
is essential to safe machine operation.
Continued use of an improperly operating
platform overload system could result in the
system not sensing an overloaded platform
condition. Machine stability could be
compromised resulting in the machine tipping
over.
Note: Perform this procedure with the machine
on a firm, level surface that is free of
obstructions.
1 Turn the key switch to platform controls.
Pull out the platform and ground red
Emergency Stop button to the on position.
2 Determine the maximum platform capacity.
3 Using a suitable lifting device, place an
appropriate test weight equal to the
maximum platform capacity in the center of
the platform floor. Raise the platform.
⊙ Result: The overload alarm not sounds
during the whole trip, indicating a normal
condition.
¤ Result: The overload alarm sounds during
the whole trip. Calibrate the platform
overload system.
4 The platform should lower to the stowed
position.
5 Add an additional weight to the platform
not to exceed 20% of the maximum rated
Load. Raise the platform.
⊙ Result: The overload alarm at the platform
controls sound, indicating a normal
condition.
¤ Result: The overload alarm at the platform
controls does not sound. Calibrate the
platform overload system.
6 Test all machine functions from the
platform controls.
⊙ Result: All platform control functions should
not operate.
7 Turn the key switch to ground control.
8 Test all machine functions from the ground
controls.
⊙ Result: All ground control functions should
not operate.
9 Lift the test weight off the platform floor
using a suitable lifting device.
10 The platform should lower to the stowed
position.
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